Obsidian Hunger. Undercover Elementals, #4

The darkest magics feed the darkest hunger. For thirteen years, Harper Goode has been the girl everyone wrote off as a crackpot. She doesn't give a damn about their opinions. Because Harper knows what evils lurk in the darkness. And the agony the obsidian fae inflicted on her years ago must be avenged. At last, she has found a portal to the other world. The catch? She needs an elemental to take her through it.
The only one who'll help her is Max, a sex-starved incubus who wants her body as payment for the service. They both have enemies hunting them. And they both have inner demons to slay. If they don't kill each other, the dark forces closing in on us just might. Obsidian Hunger is the fourth book in the Undercover Elementals series of steamy romantasy.